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 $F7-$F8/247-248:   RS232 Input Buffer Pointer

  Used by <A HREF="MAPPUC.HTM">pucrunch</A>: Bit-Stream, Escape Code

  Used by <A HREF="MAPBB.HTM">ByteBoiler</A>: Depacker

Kernal-Reference:

 LDA ($F7),Y : <A HREF="ROMF086.HTM">$F096</A>
 STA ($F7),Y : <A HREF="ROMEF90.HTM">$EFB1</A>
 STX $F7     : <A HREF="ROMF409.HTM">$F472</A>

 LDA $F8     : <A HREF="ROMF291.HTM">$F2B5</A> <A HREF="ROMF409.HTM">$F46B</A>
 STA $F8     : <A HREF="ROMF291.HTM">$F2C1</A>
 STY $F8     : <A HREF="ROMF409.HTM">$F470</A>

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